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Jason A. Bryan

Other affiliations: Ohio State University
Bio: Jason A. Bryan is an academic researcher from Cleveland Clinic. The author has contributed to research in topics: Surgical planning & Scapula. The author has an hindex of 30, co-authored 56 publications receiving 2409 citations. Previous affiliations of Jason A. Bryan include Ohio State University.


Papers
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Journal ArticleDOI
TL;DR: Novel three-dimensional preoperative planning, coupled with patient and implant-specific instrumentation, allows the surgeon to better define the preoperative pathology, select the optimal implant design and location, and then accurately execute the plan at the time of surgery.
Abstract: Background: Glenoid component malposition for anatomic shoulder replacement may result in complications. The purpose of this study was to define the efficacy of a new surgical method to place the glenoid component. Methods: Thirty-one patients were randomized for glenoid component placement with use of either novel three-dimensional computed tomographic scan planning software combined with patient-specific instrumentation (the glenoid positioning system group), or conventional computed tomographic scan, preoperative planning, and surgical technique, utilizing instruments provided by the implant manufacturer (the standard surgical group). The desired position of the component was determined preoperatively. Postoperatively, a computed tomographic scan was used to define and compare the actual implant location with the preoperative plan. Results: In the standard surgical group, the average preoperative glenoid retroversion was −11.3° (range, −39° to 17°). In the glenoid positioning system group, the average glenoid retroversion was −14.8° (range, −27° to 7°). When the standard surgical group was compared with the glenoid positioning system group, patient-specific instrumentation technology significantly decreased (p < 0.05) the average deviation of implant position for inclination and medial-lateral offset. Overall, the average deviation in version was 6.9° in the standard surgical group and 4.3° in the glenoid positioning system group. The average deviation in inclination was 11.6° in the standard surgical group and 2.9° in the glenoid positioning system group. The greatest benefit of patient-specific instrumentation was observed in patients with retroversion in excess of 16°; the average deviation was 10° in the standard surgical group and 1.2° in the glenoid positioning system group (p < 0.001). Preoperative planning and patient-specific instrumentation use resulted in a significant improvement in the selection and use of the optimal type of implant and a significant reduction in the frequency of malpositioned glenoid implants. Conclusions: Novel three-dimensional preoperative planning, coupled with patient and implant-specific instrumentation, allows the surgeon to better define the preoperative pathology, select the optimal implant design and location, and then accurately execute the plan at the time of surgery. Level of Evidence: Therapeutic Level I. See Instructions for Authors for a complete description of levels of evidence.

202 citations

Journal ArticleDOI
TL;DR: Traditional methods to correct moderate to severe glenoids deformity and place the glenoid component within 5° of the ideal position are not consistent.

159 citations

Journal ArticleDOI
TL;DR: The hypothesis that three-dimensional imaging of the shoulder would increase inter-rater agreement for assessing the extent and location of glenoid bone loss and also would improve surgical planning for total shoulder arthroplasty was tested.
Abstract: Background: Arthritic changes to glenoid morphology can be difficult to fully characterize on both plain radiographs and conventional two-dimensional computer tomography images. We tested the hypothesis that three-dimensional imaging of the shoulder would increase inter-rater agreement for assessing the extent and location of glenoid bone loss and also would improve surgical planning for total shoulder arthroplasty. Methods: Four shoulder surgeons independently and retrospectively reviewed the preoperative computed tomography scans of twenty-four arthritic shoulders. The blinded images were evaluated with conventional two-dimensional imaging software and then later with novel three-dimensional imaging software. Measurements and preoperative judgments were made for each shoulder with use of each imaging modality and then were compared. The glenoid measurements were glenoid version and bone loss. The judgments were the zone of maximum glenoid bone loss, glenoid implant fit within the glenoid vault, and how to surgically address abnormal glenoid version and bone loss. Agreement between observers was evaluated with use of intraclass correlation coefficients and the weighted kappa coefficient (κ), and we determined if surgical decisions changed with use of the three-dimensional data. Results: The average glenoid version (and standard deviation) measured −17° ± 2.2° on the two-dimensional images and −19° ± 2.4° on the three-dimensional images (p < 0.05). The average posterior glenoid bone loss measured 9 ± 2.3 mm on the two-dimensional images and 7 ± 2 mm on the three-dimensional images (p < 0.05). The average anterior bone loss measured 1 mm on both the two-dimensional and the three-dimensional images. However, the intraclass correlation coefficients for anterior bone loss increased significantly with use of the three-dimensional data (from 0.36 to 0.70; p < 0.05). Observers were more likely to locate mid-anterior glenoid bone loss on the basis of the three-dimensional data (p < 0.05). The use of three-dimensional data provided greater agreement among observers with regard to the zone of glenoid bone loss, glenoid prosthetic fit, and surgical decision-making. Also, when the judgment of implant fit changed, observers more often determined that it would violate the vault walls on the basis of the three-dimensional data (p < 0.05). Conclusions: The use of three-dimensional imaging can increase inter-rater agreement for the analysis of glenoid morphology and preoperative planning. Important considerations such as the extent and location of glenoid bone loss and the likelihood of implant fit were influenced by the three-dimensional data. Clinical Relevance: We believe that these data support the concept that three-dimensional imaging techniques applied to the shoulder provide further information that may be useful to the surgeon during the planning of total shoulder arthroplasty.

154 citations

Patent
06 Mar 2008
TL;DR: In this paper, a method of preparing for a surgical procedure includes creating a three-dimensional bone model of a subject bone of a patient and comparing it to a reference anatomic model.
Abstract: A method of preparing for a surgical procedure includes creating a three-dimensional bone model of a subject bone of a patient. At least a portion of the bone model is compared to at least one three-dimensional reference anatomic model. At least one structural difference between the bone model and the at least one reference anatomic model is identified. At least one desired subject bone structural change is specified to produce a modified bone model responsive to the step of identifying at least one structural difference between the bone model and the at least one reference anatomic model. An apparatus for preparing for a surgical procedure is also provided.

135 citations

Journal ArticleDOI
TL;DR: A previously validated, 3-dimensional, glenoid vault model is proposed as a template to predict normal glenoidal version of unilateral glenohumeral osteoarthritis, and may be valuable in correcting pathologic glenoids version due to arthritis.

133 citations


Cited by
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Journal ArticleDOI
TL;DR: The research suggests that there are several advantages to 3D-printed applications, but that further research is needed to determine whether the increased intervention costs can be balanced with the observable advantages of this new technology.
Abstract: Three-dimensional (3D) printing has numerous applications and has gained much interest in the medical world. The constantly improving quality of 3D-printing applications has contributed to their increased use on patients. This paper summarizes the literature on surgical 3D-printing applications used on patients, with a focus on reported clinical and economic outcomes. Three major literature databases were screened for case series (more than three cases described in the same study) and trials of surgical applications of 3D printing in humans. 227 surgical papers were analyzed and summarized using an evidence table. The papers described the use of 3D printing for surgical guides, anatomical models, and custom implants. 3D printing is used in multiple surgical domains, such as orthopedics, maxillofacial surgery, cranial surgery, and spinal surgery. In general, the advantages of 3D-printed parts are said to include reduced surgical time, improved medical outcome, and decreased radiation exposure. The costs of printing and additional scans generally increase the overall cost of the procedure. 3D printing is well integrated in surgical practice and research. Applications vary from anatomical models mainly intended for surgical planning to surgical guides and implants. Our research suggests that there are several advantages to 3D-printed applications, but that further research is needed to determine whether the increased intervention costs can be balanced with the observable advantages of this new technology. There is a need for a formal cost–effectiveness analysis.

698 citations

01 Jan 2016
TL;DR: The the essential physics of medical imaging is universally compatible with any devices to read, and is available in the digital library an online access to it is set as public so you can get it instantly.
Abstract: Thank you very much for reading the essential physics of medical imaging. As you may know, people have search hundreds times for their chosen novels like this the essential physics of medical imaging, but end up in harmful downloads. Rather than enjoying a good book with a cup of tea in the afternoon, instead they juggled with some infectious virus inside their laptop. the essential physics of medical imaging is available in our digital library an online access to it is set as public so you can get it instantly. Our digital library saves in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Merely said, the the essential physics of medical imaging is universally compatible with any devices to read.

632 citations

Patent
25 Jan 2011
TL;DR: In this paper, methods, compositions and tools for repairing articular surfaces repair materials and for repairing an articular surface are presented. But they do not discuss the surgical tools used to perform the repair.
Abstract: Disclosed herein are methods, compositions and tools for repairing articular surfaces repair materials and for repairing an articular surface. The articular surface repairs are customizable or highly selectable by patient and geared toward providing optimal fit and function. The surgical tools are designed to be customizable or highly selectable by patient to increase the speed, accuracy and simplicity of performing total or partial arthroplasty.

476 citations

Journal ArticleDOI
TL;DR: In this article, the authors provide the latest update to the EASL Clinical Practice Guidelines on the use of non-invasive tests for the evaluation of liver disease severity and prognosis.

428 citations

Patent
28 Apr 2010
TL;DR: In this article, the authors disclosed methods and devices relating improved articular models, implant components, and related guide tools and procedures that include one or more features derived from patient-data, for example, images of the patient's joint.
Abstract: Methods and devices are disclosed relating improved articular models, implant components, and related guide tools and procedures. In addition, methods and devices are disclosed relating articular models, implant components, and/or related guide tools and procedures that include one or more features derived from patient-data, for example, images of the patient's joint. The data can be used to create a model for analyzing a patient's joint and to devise and evaluate a course of corrective action. The data also can be used to create patient-adapted implant components and related tools and procedures.

404 citations